[Style Change] Testimonials into a slide bar (Carousel)

[AlfiyaSiddique]

Description

I want to change the testimonial layout to a slide bar layout. It will present it in a better way and also we can add as many testimonials as we want in a fixed space.

Request

If you find this style worth implementing then please assign me this issue under gssoc23 label.

Screenshots

Sample

I want to implement style similar to below:

https://github.com/agamjotsingh18/pollitup/assets/86224794/db6c0e66-73e1-499d-9a6f-0ccc5301dd71